Unwrapping-machine.



A. W. ROSS.

UNWRAPPING MACHINE.

APPLICATION FILED SEPI-26,1917. 1,222,222u

Patented 001k. 22, 1918.

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UNWRAPPING MACHINE.

APPLICATION FILED sEPLze. |911.

l 282,294., Patented Oct. 22, 1918.

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\ /SIIIMIIIIQSS A. W. ROSS.

UNWRAPPING MACHINE.

APPLICATION FILED SEPLZG. I9I7.

Patented Oct. 22, 1918.

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A. w. Ross. UNWRAPPING MACHINE.

APPLICATION FILED SEPI-26,19l7.

Patented oet. 22, 1918..

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UNWRAPPING MACHINE.

APPLlcAImN FILED sEP1.26.19|1.

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ALBERT W. ROSS, 0F AKRON, OHIO.

UNWRAPPING-MACHINE.

Lasagna.

Specification of Letters Patent.

Patented Get. 22, 1918.

Application led September 26, 1917. Serial No. 193,847.

To all whom t may concern:

Be it known that I, ALBERT W. Ross, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented new and useful Improvements in Unwrapping- Machmes, of whichthe following is a specification.

This invention relates to a machine for unwinding a helically disposedstrip from an object and rewinding the s ame on a spool and has moreespecial relation to the unwinding of the strips of canvas or duck usedfor confining the inner tubesbf double tube pneumatic tires while beingvuicanized, after the vulcanizing operation and then rewinding them upona suitable spool for reuse.

Briefly, in a large majority of cases the soft and highly resilientinner tubes of the double tube pneumatic tires are manufactured onstraight, hollow mandrels by forming them thereon according to anyapproved process and inclosing them b y helically-disposed strips duringvulcanization, which strips ai'e subsequently removed to permit theremoval of the vulcanized inner tube from the mandrel. Experience hasshown that the unwinding of the used fabric strip, and which we maystate is subject t0 frequent reuse, is a long and laborious operationconsuming time and labor. Therefore, the object of theinvention t0provide 'a machine by which the helically-disposed strips may be quicklyand easily unwound or removed and wound up on a suitable druin or spooltocnable the strips to be reused for subsequent vulcanizations.

With the foregoing and other objects in View, the invention consists inthe novel construction, combination and arrangement of partsconstituting the invention to be hereinafter specifically described andillustrated in the accompanying drawings which form a part hereofwherein is shown the preferred embodiment of the invention, but it is tobeunderstood that changes, variations and modifications can be resortedto which come within the scope of the matter hereinafter claimed.

In the drawings in which similar refer-A ence numerals indicate likeparts in the different figures,

Figure 1 is a view in side elevation of a machine embodying thepresentinvention.

Fig. 2 is a view of the same machine looking from the left in Fig. l.

Fig. 3 is a view similar to Fig. 2 looking from the right in Fig. 1.

Fig. 4 is a vertical transverse section of' which is complemental tothedevice shown in Fig. 9 for holding the winding spool at the opposite endof the machine.

Fig. 11 is a sectional view taken approximately on line 11 of Fig. 10,

Fig. 12 is an enlarged detail view of the mechanism employed foradjusting the position of an automatic feed for picking up the mandrelcarrying the inandrels.

Figs. 13, 14 and 15 are views of an ejector employed for withdrawing themembers shown in Fig. 5 for engagement with each mandrel after thecompletion of the unwinding operation.

Fig. 16 is a detail of the device employed for controlling the feed ofthe wrapped mandrel to the device, and

Fig. 17 is a plan view of the device shown in Fig. 1 with portionsthereof broken away to better illustrate the construction of the device.

Referring to the drawings in detail the reference numerals 1 and 2denote two oppositely-disposed upright housings which are generallyin-the form of an upright A with properly disposed legs for sustainingthe same on a supporting instrumentality and provided with transversebars in each of which are positioned bearings 3 for a horizontal shaft4. The housing 1 is provided at its apex with a bearing 5 and thehousing 2 is provided at its apex with a bearing 6. Extending betweenthese bearings 5 and 6 is a shaft 7. The housing l is further providedwith an outwardly-projecting shelf or bracket 8 for a purpose to belater described. F iXedly mounted on the shaft 4 within the housings 1and 2 and adjacent to each` are a pair of heads 9 and 10, which are heldin position by means of keys or other means 11. The peripheral faces ofthe two heads 9 and 10 are provided with spur gear teeth 12 and 13respectively. These teeth are formed on outwardly and oppositelydisposed iianges on the heads and the remainder of the heads arecomparatively thin and are fashioned with suitable hubs for the shaft 4.On the shaft 7 are a pair of pinions 14 and 15 which are arranged tointcrmesh respectively with the gear teeth 12 and 13. On the shaft 7outside of the bearing 5 is `a spur gear 16 arranged to intermesh with apinion 17 on the arma. ture shaft of a motor 18 mounted on the shelf orbracket 8 so that as the armature of the shaft 18 is rotated at a.relatively high speed the shaft 17 is driven at a slower speed and thetwo heads 12 and 13 revolve in umson at a still slower speed on theshaft 4 as an axis.

The head 9 is provided with a plurality of equidistant seats arrangednear the peripheral portion thereof in each of which is mounted aclamping member for holding the mandrel carrying the vulcanized tube andin the head 10 and oppositely disposed to the seats in the head 9 areseats for complemental clamping members arranged to hold and sustain theopposite ends of the mandrels. There will be the same number of clampingmembers in each head and they will be disposed in even series aroundeach head and near the peripheral portions thereof and in the drawingsthere are shown eight seats in each head for this purpose. As the formof clamping members employed in connection with both heads is similarthe construction of only one of the clamping members employed inconnection with the head 9 will be described and reference is directedespecially -to Figs. 5, 6, 7, 8 and 17. Each seat in the head 9 consistsof a hub or boss 20 provided with a square aperture 21 eX- tendingtherethrough and constituting a holding means or bearing for theclamping member. The. clamping members for bot-h of the heads 9 and 10are all similar and it is thought that a description of one will besufficient for the understanding of them all.

Each clamping member embodies a sleeve 22 having a square shapedinwardly-extending sha-nk 23 ordinarily arranged to seat in a squareaperture in the boss 20, and outside of the head 9 is an enlargedcylindrical portion 24 providing a shoulder 25 for a purpose to be laterdescribed. The outer end of the enlarged cylindrical portion 24 isprovided with a cylindrical'flange or head 26 in which is a recess 27.The inner end of the square portion or shank 23 is threaded to receive acap 28 and in the inner face of which is a ball race to hold frictionreducing balls 29 for a purpose to be later described. Between the cap28 and the inner face of the head 9 is a coiled spring 30 the normaltendency of which is to` force the cap 28 inwardly toward the center ofthe device. Rotatably mounted in the sleeve 22 is a shaft 31` providedon its inner end with a conically formed head 32 and at its opposite endof the spring- 30 and its inward movement is 70 limited by theengagement of the shoulder 25 with the boss 2O and outward movement ofthe clamp is resisted by the spring 30 so as to constitute means forclamping one end of the mandrel 34 containing an inner 75 tube duringthe iinwinding of the confining material such as canvas or/.dilck Therear face of the conical head 32 is `adapted to engage the balls 29running in the `race in the cap 28 to reduce friction 80 incident to therotation ofthe shaft 31 during the unwinding operation. Under normalconditions the spring 30 forces the conical head 32 inwardly toward thecenter of the device until further movement is interrupted by theengagement of the shoulder with the rear face of the boss 20 on themember 9. The positioning of a mandrel 34 vagainst the conical face ofthe head 32 serves to compress the spring 30 slightly sufficient 90 toset up a frictional engagement between the head 32 and the mandrel 34causing the rotation of the shaft 31 and the friction incident to thisrotation with regard to the cap 28 is reduced through the medium of the95 friction reducing balls 29. Opposite to each of the clamping membersin the head 9 is a complemental clamping member whichis identicallysimilar in construction to the clamping member in the head 9 and henceit 100 is thought a further description of -the clamping members in thehead 10 is unnecessary and it is thought that an understanding of bothcan be obtained from the foregoing description and an inspection ofFigs.

5, 6, 7 and 8 of the drawings.

Mounted for loose revolution on the shaft 4 between the housing 1 andthe head 9 is a wheel 50 the outer face of which is provided with spurteeth 51. Arranged to in 110 termesh with the teeth 51 is a pinion 52mounted on the armature shaft 53 of a motor 54 positioned on a bracket55 secured to one of the legs of the housing 1. Arranged in the head 9and equidistant with respect to 115 the aXis of the shaft 4 andequidistant with respect to the distance between each other Y and alsoeach equidistant with respect to the shaft 4 are a plurality of bearings56. Custoinarily each bearing 56 will be disposed 120 slightly inadvance of each clamping member with regard to the phase of movement ofthe head 9 and each positioned radially inward therefrom and as themechanism contained in each bearing issimilar to the\12.3

others a description of one mechanism is believed to be sufficient forthe understanding of them all and reference is especially directed toFig. 9. Mounted in each bearing 5G is a shaft. 57l on the outer end of130 which is mounted a spur pinio1r58 so positioned as to inter-meshwith the gear' teeth 51 on the .wheel 50. Inside of the wheel 5() theshaft is provided with a collar 59 for preventing longitudinal movementof the shaft 57. Secured on the inner end of cach shaft 57 by anypreferred means is a chuck (SO usually of the common three jaw universalvariety for grasping the end of a hollow takeup spool or core 61 whichis inserted therein. From the foregoing it Will be seen that thesechucks (S0 are rotated by means of the revolution of the wheel 50independently of thevmovement of the heads 9 and 10 which carry themandrels containing the wrapped inner tubes. l

The head 10 is provided with a plurality of bearings arranged inidentically simllar relative positions therein as are the shafts 57 inthe head 9 and each oppositely disposed to one of said chuck bearingshafts 57. Each of these bearings constitute a bearing and supportingmedium for a spring clamping device which is complemental to one of thechucks 60. Each of these clamping members comprises a square tubularmember 36 the outer end of which is provided with an enlarged flange 37provided with a re'cess 38 and at its opposite end is threaded toreceive a cap 39 the inner face of which is provided with a ball racefor friction reducing balls 40 and between the cap 39 and the inner faceof the head 10 is a coil spring 41 which serves the same purpose as thespring 30. Rotatably mounted within the member 36 is a shaft 42 bearingat its outer end a collar 43 arranged to seat in the recess 38 andassist in holding the shaft 43 from longitudinal movement with respectto the member 36. Mounted on the inner end of the shaft 43 is aconically-shaped head 44 the outer face of which engages the balls 40during the rotation thereof and it is further provided with aninwardly-projecting stem 45 which projects into the mandrel 61v and thefunction of which will be described later.

The tube forming mandrels 31- on which are mounted the vulcanized innertubes, properly wrapped with a helical winding of retaining andcompressing bands of fabric are fed to the device for unwrapping thefabric by the following mechanism.

Positioned on the feeding side of the device is a platform 66 mounted onsupports 67 and customarily provided with guard rails 68. This platform,supports and guard rails may be of any preferred construction. Mountedon the frame which supports the platform 66 is a delivery chute 69 alongwhich the mandrels are adapted to roll usually in substantially closecontact and this chute comprises a pair of bars 70 to the ends of whichare hinged bars 71 the inner ends of which are upturned in hook shape.

These bars 70 and 71 are in parallelism and are positioned inwardly fromthe two heads 9 and 10 as clearly shown in Fig. 17. Secured to thehousings 1 and '2 are brackets 72 provided with bearings for atransverselyextending shaft 73. Mounted on the shaft 73 is a pair ofeccentrics 7l each of which is so positioned that the under face of oneof the hinged bars '7l rests thereon and the free end of which is raisedor lowered a slight. distance oy the rotation of the eccentric. Theshaft 73 also bears at one end adjacent to the housing 2 a worm-wheel 75which is engaged by a worm 76 on a shaft 77 mounted in a bearing 78 onthe housing 2. The shaft 77 will usually be provided at its outer endwith an operating wheel 79 by which it is rotated. The reason forproviding the hinged delivery bars 71 and providing means for raising orlowering the outer ends thereof is to adjust the position of the ends ofthe bars so that when the downward movement of a mandrel is terminatedby the hooked ends of the bars 71 and is engaged by the clamping membersabsolute registration of the mandrel with `the clamping members may beobtained, this being due to the fact that the machine is adapted for usein connection with mandrels for making different.

sizes of inner tubes.

In order to control the feed of the mandrels to the device it isimperative that they be fed singly one by one into a position to beengaged by the clamping members or in other words to seat singly in thehookedshaped ends of the bars 71 and hence in order to regulate andcontrol the spacing or intermittent feed of the mandrels to the devicethe following mechanism is employed. Secured to the platform 66 or othersuitable support are brackets 80 provided with bearings 81 in which ismounted a shaft 82 at one end of which is mounted an arm 83 which isadapted to be engaged intermittently by pins 84 on one of the heads ofthe device. Mounted on the shaft 81 and spaced from the brackets 80 atopposite ends of the device are feeding arms each consisting of a hubprovided with an aperture to receive the shaft 82 and also provided withtwo widely diverged arms 85. These feeding devices are mounted on theshaft 82 and are adapted to be alternately rocked or oscillated by themovement incident by the the inandrels containing the tubes will besecured. The inandreds after the unwinding of the fabric therefrom,which operation will be described later, are moved from the deviceautomatically by the following mechanism. lt may be pointed out that theclamping members which are mounted 1n the head 9 are provided withcylindrical projecting ends 24, on theouter ends'of which are flanges26, and these clamping members are normally held in their inward oroperative position so as to engage theend of a mandrel by means of thecoiled springs 30 and it will be obvious, of course, that if theclamping members are shifted outwardly away from the mandrels, themandrels will then be released. In order to effect automatically theintermittent outward movement of the clamping members to theirinoperative position there is positioned on the housings 1 and 2,ejectors which engage the flanged ends of thev clamping members andgradually withdraw the clamping members to their inoperative positionsand out of engagement with the mandrels. These ejectors each consist ofa boxlike structure shown best in Figs. 13, 14 and 15 and each comprisesa body portion 86 having side walls S7 and a curved inner wall 88 inwhich is a slot 89 large enough to accommodate the cylindrical portion24 of the clamping members but smaller than the flanged heads 26.Furthermore, the ejectors are wider transversely at one end than theother and the slot 89 extends throughout the wall 28. These ejectors areso positioned that during the orbital movement of each clamping memberthe projecting end of each clamping member will engage therein and theflanged head 26 engage the interior face of the wall 88 and during thepassage of the head through said ejector and each clamping member willgradually be withdrawn from engagement with the mandrel, the clampingmember returning to its operative position after the passage through theejector and after the release of the mandrel held thereby. Theseejectors are positioned at the lower portions of the housings andsuitably positioned to withdrawn the clamping members on the heads 9 and10 from engagement with the mandrel after the unwinding operation hastaken place.

The rubber covered mandrels from which the tape -or binding fabric hasbeen removed are carried to a suitable place by means of a pair ofconveyer belts which are supported as follows: Mounted on the floorbelow the machine are a pair of upright bearings 90 in which is mounteda rotatable shaft 91 bearing outside of the bearings -a pair of pulleys92 around each of which passes a conveyer belt 93 provided withhook-shaped lugs 94 the lugs on the two belts being in transversealinement. Mounted on suitable supports 95 are a' pair of guides 96which are customarily positioned outside of theI ends of the shaft 91and are inclined from the position occupied by the mandrel after thewithdrawal of the clamping members from engagement therewith so that themandrels thus freed from engagement with the clamping members will rolldown the two guides 96 and are picked up by the lugs 94 on the conveyerbelt 93 and conveyed to any suitable or designated place. In order tosupport an operator as will more fully appear later there is provided aplatform 96 mounted on supports 97 and usually provided with guard rails9S placed adjacent to the delivery portion of the device.

The operation of the device is as follows: The inandrels covered withvulcanized tubes wrapped helically about with a strip of fabric are fedalong the chute G9 in substantially close Contact and their progress isinterrupted by the feeding device embodying the feeding device 85 on theshaft 82 which allows each mandrel to roll down singly over the bars 71and their descent is terminated by their engagement with the upturnedhooked ends of these two bars and when in this posit-ion they are inalinement with the clamping' members on the heads 9 and 10. The heads 9are slowly revolving due to the mechanism already described embodyingthe motor 1S, pinion gear 17, spur gear 16, shaft 7, pinion gear 14,which intermeshes with the teeth 12 on the outer face of the head 9 andat the same time the pinion gear 15 on the shaft 7 simultaneouslyrotates the head 10 by its engagement with the teeth 13 thereon. Eachmandrel will be so positioned when held at the termini of the bar 71that when the flanged heads 26 of the clamping membersspass out fromengagement with the ejector they will be in axial alinement with theopen ends of the inandrels held on these bars and will by virtue of thesprings 30 be snapped into operative engagement with the mandrel andmove the same orb-itally to the left in Fig. 4 until in a position,where an operator standing on the plat-form 66 can attach one end of thestrip of fabric to the adjacent spool 61. The spools 61 are all rotatedsimultaneously and by common mechanism, hence a description of one isbelieved sufficient for the rest. The spools are all rotated by therevolution of the wheel 50 which is provided with spur teeth 51intermeshing with the pinions 58 on the clutch holding the shafts 57each of which serves to sustain in unison with the companion member onthe head 10 a core or spool. The wheel 50 is revolved through the mediumof the motor 54, the shaft of which bears a spur gear 52 intermeshingwith the spur teeth 51 so that the cores or spools are rotatedconstantly during their orbital movement and the orbital movement of themandrels 34.

-During the orbital movement of the spools from the position lnear theplatforn'l (S6 'where the tape or binding material is apspool and theunwinding operation from the.

vulcanized tube to the spool is'substantially completed by the time thatthe mandrel containing the vulcanized tube has reached the positionadjacent to the platform 9G. W hen the spools have been substantiallylilled they are removed manually by the operator on the platform 96. Themandrels 34 which are held by the clamping members pass downwardlybeyond the platform 96, the flanged heads 26 ofthe clamping members passinto the open mouthed ends of the ejectors secured to the housings whichit will be noticed are provided with sharp covered inner faces whichquickly withdraw the clamping members from engagement with the mandrelallowing the mandrels to drop onto the two guides 96 from which theyroll into place on the conveyer belts 93 and are picked up by the lugs94 and conveyed to a place where the inner tubes are stripped therefromand the mandrels returned for reuse. The passage of the flanged heads 26from engagement with the ej ectors is coincident with the positioning ofthe mandrel at the hooked ends or termini of the bars 71 so that eachpair of clamping members as soon as thdy pass from said engagement willenga-ge a wrapped mandrel.

It will be further pointed out that the machine is adapted for use inconnection with mandrels of various diameters and hence in order toadapt the device so that the clamping members will engage mandrels ofdifferent diameters the adjusting device shown in Fig. 12 is employed soas to raise the ends of the arcuate or hooked portions of the members 71into proper position to sustain the mandrels so that their axes willcoincide with the axes of the clamping members by which they are to beengaged.' In case of large mandrels the arcuate end of the member 71will be lowered and in case of smaller mandrels the free ends of themember 71 will be raised so as to make the axes of the clamping membersand the mandrels coincident in so far as possible. During the movementof the device the mandrels are fedl downwardly to the device by means ofthe rocking arms 85 of the feeding device which is secured by engagementof the arm 83 with properly positioned pins 84 on the inner faces of thehead 9.

I claim,

1. A machine of the class designated comprising a pair of spacedhousings, a rotatable shaft extending therebetween, means to rotate saidshaft, a pair of heads ixedly mounted on said shaft, a series of mandrelclamping means carried by each head and arranged to hold the mandrels inparallelism with respect to said shaft during their orbital movement, aspool mounted adjacent to each mandreh'means on said heads for holdingsaid spools, means to simultaneously revolve all of said spools tounwind helically-disposed strips von the tubes on said mandrels duringtheir orbital movement.

2. A machine of the class designated comprising a pair of spacedhousings, a rotatable shaft extending therebetween, means to rotate saidshaft, a pair of heads ixedly mounted on said shaft, a series of mandrelclamping'means carried by each head and arranged to hold the mandrels inparallelism with respect to said shaft during their orbital movement, aspool mounted adjacent to each mandrel, means on said heads for holdingsaid spools, means to simultaneously revolve all of said spools tounwind helical strips disposed on the tubes on said mandrels duringtheir orbital movement, and means to automatically release the mandrelclamping means from said mandrels in their orbital movement.

3. A machine of the class designated comprising a pair of spacedhousings, a rotatable shaft extending therebetween, means to rotate saidshaft, a pair of heads fixedly mounted on said shaft, a series ofmandrel clamping means carried by each head and arranged to hold themandrels in parallelism with respect to said shaft during their orbitalmovement, a spool mounted adjacent to each mandrel, means on' said headsfor holding said spools, means to simultaneously revolve all of .saidspools to unwind helical strips disposed on the tubes on said mandrelsduring their orbital movement, and means to feed the tube inclosedmandrels to said device.

4. A machine of the class designated comprising a pair of spacedhousings, a rotatable shaft extending therebetween, means to rotate saidshaft, a pair of heads ixedly mounted on said shaft, a series of mandrelclamping means carried by each head and arranged to hold the mandrels inparallelism with respect to said shaft during their orbital movement, aspool mounted adjacent to each mandrel, means on said heads for holdingsaid spools, means to simultaneously revolve all of said spools tounwind helical strips disposed on the tubes on said mandrels duringtheir orbital movement and means to control the feed of mandrelsinclosed by the vulcanized tubes to said device.

5. A machine of the class designated eomprising a pair of spacedhousings, a rotatable shaft extending therebetween, means to rotate saidshaft, a pair of heads lixedly mounted on said shaft, a series ofmandrel clampino means carried by each head and arranged to hold themandrels in parallelism wit-h respect to said shaft during their orbitalmovement, a spool mounted adjacent to each mandrel. means on said headsfor holding said spools, means to simultaneously ri volveall of saidspools to unwind helical strips disposed on the tubes on said mandrelsduring their orbital movement and means to convey the nnwrappedIiiandrels to a designated place.

(l. A machine of the class designated coinprising a pair. of spacedhousings, a rotatable shaft extending therebetween, means to rotate saidshaft, a pair of heads tixedly mounted on said shaft., mandrel clampingmembers on said heads. spool holders on said heads, said spool holdersarranged in close proximity to said clamping members, spools on `saidspool holders, means to revolve said spool holders simultaneiisly andmeans to feed wrapped mandrels to said de.- vice.

7. A machine of the class designated coinprising a pair of spacedhousings, a rotatable shaft extending therebetween, means to rotate saidshaft, a pair of heads fixedly mounted on said shaft, a series ofmandrel clamping means carried by each head and arranged to hold themandrels in parallelism with respect to said shaft during their orbitalmovement, spool holders mounted in each head, the spool holders on onehead provided with projecting shafts, pinion gears mounted on saidshafts, a toothed wheel mounted on said shaft, the teeth of which arearranged to intermesh with said pinion gears. means to revolve saidwheel independently of the revolution of said heads.

8. A machine of the class designated comprising a pair of spacedhousings, a rotatable shaft extending therebetween, means to rotate saidshaft, a pair of heads fixedly mounted on said shaft, a series ofmandrel clamping means carried by each head and arranged to hold themandrels in parallelism with respect to said shaft during their orbitalmovement, spool holders mounted in each head, the spool holders on onehead provided with projecting' shafts, pinion gears mount-ed on saidshafts, a toothed wheel mounted on said shaft, the teeth of which are.arranged to intel-mesh with` said pinion gears, means to revolve saidwheel independently of the revolution of said heads and means to feedWrapped mandrels to said device.

9. A machine of the class designated comprising a pair of spacedhousings, a rotatable shaft extending therebetween, means to rotate saidshaft, a pair of heads fixedly mounted on said shaft, a series ofmandrel clamping means carried bv each head and arranged to hold themandrels in parallelisili with respect to said shaft during theirorbital movement spool holders mounted in each head, the spool holderson one head provided with projecting shafts, pinion gears mounied onsaid shafts, a toothed wheel mounted `on said shaft, the teeth of whichare arranged to intermesh with said pinion gears, means to revolve saidwheel independently of the revolution of said heads and means to feedthe wrapped mandrels to said device singly, said means em-v bodyingmechanism controlling said feed, whereby the feed of said mandrels issynelironous with respect to the rotation of said wheel.

l0. A machine Aof the class designated comprising a pair of spacedhousings, a rotatable shaft extending therebetween, means to rotate saidshaft, ,a pair of heads fixedly mounted on said shaft, a series ofmandrel clamping means carried by each head and arranged to hold themandrels in parallelism withrespect to said shaft during their orbitalmovement, spool holders mount-ed in each head, the spool holders on onehead provided with projecting shafts, pinion gears mounted on saidshafts, a toothed wheel mounted on said shaft, the teeth of which arearranged to intermesh with said pinion gears, means to revolve saidwheel independently of the revolution of said heads and means towithdraw said clamping means from said mandrel to permit the release ofsaid mandrels from said device and means to convey said mandrels to adesignated place.

11. A machine of the class designated comprising a pair of spacedhousings, arotatable shaft extending therebetween, means to rotate saidshaft, a pair of heads ixedly mounted on said shaft, a series of mandrelclamping means carried by each head and arranged to hold the mandrels inparallelism with respect to said shaft during their orbital movement,spool holders mounted in each head, the spool holders on one headprovided with projecting shafts, pinion gears mounted on said shafts, atoothed wheel mounted on said shaft, the teeth of which are arranged tointermesh with said pinion gears, means to revolve said wheelindependently of the revolution of said heads, means to withdraw saidclamping members from said mandrels to permit the release of saidmandrels from said device and means to feed the wrapped mandrels to saiddevice, the delivery of said mandrels being synchronous with thetermination of engagement of said clamping means with said releasingmeans.

In testimony whereof I have hereunto set my hand.

ALBERT W. ROSS'.

